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Envelope follower with gate and trigger outputs


The Envelope Follower module is capable of creating control voltages from an audio source, trigger pulses, gate signals and also from other control voltages.


It can also generate trigger and gate pulses when the incoming signal goes above a certain threshold.  You can adjust the attack and decay response times to generate swells or sustained envelopes.


Extract the envelope of an audio signal or change the time characteristics of other control voltages with the SynQuaNon Envelope Follower.

Add as 7th channel to Hex EF-Gate-Trigger via expansion header.

Ideal for guitar multi-channel, single-string, or hexaphonic effects processing.

Hand-assembled in the USA.


  • Accepts audio or CV inputs up to +/-12V

  • Input level, gate/trigger threshold, and EF output level controls

  • Normal and inverted EF outputs

  • Output LEDs provide visual signal level feedback, including EF clipping

  • Expansion header on back allows this to add a 7th channel to the Hex EF-Gate-Trigger module

  • Pairs well with 13-Pin Input Breakout, Nexus Input Breakout, Hex Fuzz, Hex VU Meter, 7-Channel Amplifier-Attenuator, Hex VCF, Hex EF-Gate-Trigger, and Hex VCA.

Technical Specifications:

Width       5 HP

Depth     37 mm

Power     32 mA @ +12V

                  10 mA @  -12V

                   0 mA @  +5V

EF Out, Gate Out, Trigger Out CV -  0V to 10V

EF Inverted Out CV  -  -10V to 0V

Reverse power protection, resettable fuses, extensive power supply filtering

View the v3.2 Manual

View on ModularGrid

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